| 1 | #ifndef _FS_CEPH_OSD_CLIENT_H |
| 2 | #define _FS_CEPH_OSD_CLIENT_H |
| 3 | |
| 4 | #include <linux/completion.h> |
| 5 | #include <linux/kref.h> |
| 6 | #include <linux/mempool.h> |
| 7 | #include <linux/rbtree.h> |
| 8 | |
| 9 | #include "types.h" |
| 10 | #include "osdmap.h" |
| 11 | #include "messenger.h" |
| 12 | |
| 13 | struct ceph_msg; |
| 14 | struct ceph_snap_context; |
| 15 | struct ceph_osd_request; |
| 16 | struct ceph_osd_client; |
| 17 | struct ceph_authorizer; |
| 18 | |
| 19 | /* |
| 20 | * completion callback for async writepages |
| 21 | */ |
| 22 | typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *, |
| 23 | struct ceph_msg *); |
| 24 | |
| 25 | /* a given osd we're communicating with */ |
| 26 | struct ceph_osd { |
| 27 | atomic_t o_ref; |
| 28 | struct ceph_osd_client *o_osdc; |
| 29 | int o_osd; |
| 30 | int o_incarnation; |
| 31 | struct rb_node o_node; |
| 32 | struct ceph_connection o_con; |
| 33 | struct list_head o_requests; |
| 34 | struct list_head o_osd_lru; |
| 35 | struct ceph_authorizer *o_authorizer; |
| 36 | void *o_authorizer_buf, *o_authorizer_reply_buf; |
| 37 | size_t o_authorizer_buf_len, o_authorizer_reply_buf_len; |
| 38 | unsigned long lru_ttl; |
| 39 | int o_marked_for_keepalive; |
| 40 | struct list_head o_keepalive_item; |
| 41 | }; |
| 42 | |
| 43 | /* an in-flight request */ |
| 44 | struct ceph_osd_request { |
| 45 | u64 r_tid; /* unique for this client */ |
| 46 | struct rb_node r_node; |
| 47 | struct list_head r_req_lru_item; |
| 48 | struct list_head r_osd_item; |
| 49 | struct ceph_osd *r_osd; |
| 50 | struct ceph_pg r_pgid; |
| 51 | |
| 52 | struct ceph_connection *r_con_filling_msg; |
| 53 | |
| 54 | struct ceph_msg *r_request, *r_reply; |
| 55 | int r_result; |
| 56 | int r_flags; /* any additional flags for the osd */ |
| 57 | u32 r_sent; /* >0 if r_request is sending/sent */ |
| 58 | int r_got_reply; |
| 59 | |
| 60 | struct ceph_osd_client *r_osdc; |
| 61 | struct kref r_kref; |
| 62 | bool r_mempool; |
| 63 | struct completion r_completion, r_safe_completion; |
| 64 | ceph_osdc_callback_t r_callback, r_safe_callback; |
| 65 | struct ceph_eversion r_reassert_version; |
| 66 | struct list_head r_unsafe_item; |
| 67 | |
| 68 | struct inode *r_inode; /* for use by callbacks */ |
| 69 | |
| 70 | char r_oid[40]; /* object name */ |
| 71 | int r_oid_len; |
| 72 | unsigned long r_stamp; /* send OR check time */ |
| 73 | bool r_resend; /* msg send failed, needs retry */ |
| 74 | |
| 75 | struct ceph_file_layout r_file_layout; |
| 76 | struct ceph_snap_context *r_snapc; /* snap context for writes */ |
| 77 | unsigned r_num_pages; /* size of page array (follows) */ |
| 78 | struct page **r_pages; /* pages for data payload */ |
| 79 | int r_pages_from_pool; |
| 80 | int r_own_pages; /* if true, i own page list */ |
| 81 | }; |
| 82 | |
| 83 | struct ceph_osd_client { |
| 84 | struct ceph_client *client; |
| 85 | |
| 86 | struct ceph_osdmap *osdmap; /* current map */ |
| 87 | struct rw_semaphore map_sem; |
| 88 | struct completion map_waiters; |
| 89 | u64 last_requested_map; |
| 90 | |
| 91 | struct mutex request_mutex; |
| 92 | struct rb_root osds; /* osds */ |
| 93 | struct list_head osd_lru; /* idle osds */ |
| 94 | u64 timeout_tid; /* tid of timeout triggering rq */ |
| 95 | u64 last_tid; /* tid of last request */ |
| 96 | struct rb_root requests; /* pending requests */ |
| 97 | struct list_head req_lru; /* pending requests lru */ |
| 98 | int num_requests; |
| 99 | struct delayed_work timeout_work; |
| 100 | struct delayed_work osds_timeout_work; |
| 101 | #ifdef CONFIG_DEBUG_FS |
| 102 | struct dentry *debugfs_file; |
| 103 | #endif |
| 104 | |
| 105 | mempool_t *req_mempool; |
| 106 | |
| 107 | struct ceph_msgpool msgpool_op; |
| 108 | struct ceph_msgpool msgpool_op_reply; |
| 109 | }; |
| 110 | |
| 111 | extern int ceph_osdc_init(struct ceph_osd_client *osdc, |
| 112 | struct ceph_client *client); |
| 113 | extern void ceph_osdc_stop(struct ceph_osd_client *osdc); |
| 114 | |
| 115 | extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc, |
| 116 | struct ceph_msg *msg); |
| 117 | extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, |
| 118 | struct ceph_msg *msg); |
| 119 | |
| 120 | extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, |
| 121 | struct ceph_file_layout *layout, |
| 122 | struct ceph_vino vino, |
| 123 | u64 offset, u64 *len, int op, int flags, |
| 124 | struct ceph_snap_context *snapc, |
| 125 | int do_sync, u32 truncate_seq, |
| 126 | u64 truncate_size, |
| 127 | struct timespec *mtime, |
| 128 | bool use_mempool, int num_reply); |
| 129 | |
| 130 | static inline void ceph_osdc_get_request(struct ceph_osd_request *req) |
| 131 | { |
| 132 | kref_get(&req->r_kref); |
| 133 | } |
| 134 | extern void ceph_osdc_release_request(struct kref *kref); |
| 135 | static inline void ceph_osdc_put_request(struct ceph_osd_request *req) |
| 136 | { |
| 137 | kref_put(&req->r_kref, ceph_osdc_release_request); |
| 138 | } |
| 139 | |
| 140 | extern int ceph_osdc_start_request(struct ceph_osd_client *osdc, |
| 141 | struct ceph_osd_request *req, |
| 142 | bool nofail); |
| 143 | extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, |
| 144 | struct ceph_osd_request *req); |
| 145 | extern void ceph_osdc_sync(struct ceph_osd_client *osdc); |
| 146 | |
| 147 | extern int ceph_osdc_readpages(struct ceph_osd_client *osdc, |
| 148 | struct ceph_vino vino, |
| 149 | struct ceph_file_layout *layout, |
| 150 | u64 off, u64 *plen, |
| 151 | u32 truncate_seq, u64 truncate_size, |
| 152 | struct page **pages, int nr_pages); |
| 153 | |
| 154 | extern int ceph_osdc_writepages(struct ceph_osd_client *osdc, |
| 155 | struct ceph_vino vino, |
| 156 | struct ceph_file_layout *layout, |
| 157 | struct ceph_snap_context *sc, |
| 158 | u64 off, u64 len, |
| 159 | u32 truncate_seq, u64 truncate_size, |
| 160 | struct timespec *mtime, |
| 161 | struct page **pages, int nr_pages, |
| 162 | int flags, int do_sync, bool nofail); |
| 163 | |
| 164 | #endif |
| 165 | |